<?php
namespace backend\components;
use yii\widgets\LinkPager;
use yii\helpers\Html;


class GoLinkPager extends LinkPager
{
 // 是否包含跳转功能跳转 默认false
 public $go = false;
 protected function renderPageButtons()
 {
     if(!empty($this->pagination)){
  $pageCount = $this->pagination->getPageCount();
  if ($pageCount < 2 && $this->hideOnSinglePage) {
   return '';
  }


  $buttons = [];
  $currentPage = $this->pagination->getPage();
  // first page
  $firstPageLabel = $this->firstPageLabel === true ? '1' : $this->firstPageLabel;
  if ($firstPageLabel !== false) {
   $buttons[] = $this->renderPageButton($firstPageLabel, 0, $this->firstPageCssClass, $currentPage <= 0, false);
  }
  // prev page
  if ($this->prevPageLabel !== false) {
   if (($page = $currentPage - 1) < 0) {
    $page = 0;
   }
   
   $buttons[] = $this->renderPageButton($this->prevPageLabel, $page, $this->prevPageCssClass, $currentPage <= 0, false);
  }
  // internal pages
  list($beginPage, $endPage) = $this->getPageRange();
  for ($i = $beginPage; $i <= $endPage; ++$i) {
   $buttons[] = $this->renderPageButton($i + 1, $i, null, false, $i == $currentPage);
  }
  // next page
  if ($this->nextPageLabel !== false) {
   if (($page = $currentPage + 1) >= $pageCount - 1) {
    $page = $pageCount - 1;
   }
   $buttons[] = $this->renderPageButton($this->nextPageLabel, $page, $this->nextPageCssClass, $currentPage >= $pageCount - 1, false);
  }
  // last page
  $lastPageLabel = $this->lastPageLabel === true ? $pageCount : $this->lastPageLabel;
  if ($lastPageLabel !== false) {
   $buttons[] = $this->renderPageButton($lastPageLabel, $pageCount - 1, $this->lastPageCssClass, $currentPage >= $pageCount - 1, false);
  }
  // go
  if ($this->go) {
   $goPage = $currentPage + 1;
   $goHtml = <<<goHtml
    <div class="form" style="float: left; color: #999; margin-left: 10px; font-size: 12px;">
     <span class="text">共 {$pageCount} 页</span>
     <span class="text">到第</span>
     <input class="input" type="number" value="{$goPage}" min="1" max="{$pageCount}" aria-label="页码输入框" style="text-align: center; height: 25px; line-height: 20px; margin-top: 5px; width: 46px;">
     <span class="text">页</span>
     <span class="btn btn-primary go-page" role="button" tabindex="0" style="border: solid 1px #ccc; padding: 0px; height: 25px; width: 46px; line-height: 25px;">确定</span>
    </div> 
goHtml;
   $buttons[] = $goHtml;
   $pageLink = $this->pagination->createUrl(false);
   $goJs = <<<goJs
    $(".go-page").on("click", function () {
     var _this = $(this),
      _pageInput = _this.siblings("input"),
      goPage = _pageInput.val(),
      pageLink = "{$pageLink}";
      pageLink = pageLink.replace("page=1", "page="+goPage);
     if (goPage >= 1 && goPage <= {$pageCount}) {
      window.location.href=pageLink;
     } else {
      _pageInput.focus();
     }
    });
goJs;
   $this->view->registerJs($goJs);
  }

  return Html::tag('ul', implode("\n", $buttons), $this->options);
 }
      }
}